Kujirada's Digital Pet was a Hidden Pet, which is a rare type of Digital Pet that lives much longer than regular pets and has other superior properties. Such pets are identified by having a star in their graphics.
Kujirada's pet became more of a master than a pet towards Kujirada and often kept him awake, demanding to be fed. Kujirada began feeding other pets to him, including Peachy. He tried feeding it U2, but using the data it incorporated from Joe, U2 defeated and destroyed Kujirada's pet.
Despite the loss of a powerful Pet, Kujirada was happy that he would at least get some sleep.